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(Click for frequent words.) 80 galaxies 78 galaxy cluster 74 quasars 73 supermassive black holes 72 neutron star 72 quasar 72 neutron stars 72 elliptical galaxies 71 distant galaxies 71 merging galaxies 71 dwarf galaxies 70 X ray emission 69 elliptical galaxy 69 globular clusters 69 active galactic nuclei 69 supernovae 69 accretion disk 68 spiral galaxies 68 brown dwarfs 68 supermassive black hole 68 AGNs 67 protostar 67 galactic clusters 67 Milky Way galaxy 67 dwarf galaxy 67 GRBs 67 rocky planets 67 starburst galaxies 66 pulsars 66 planetary nebulae 66 magnetar 66 supernova remnants 66 supernova explosions 66 planetesimals 65 globular cluster 65 globulars 65 luminous galaxies 65 protoplanetary disk 65 supernova explosion 65 Type Ia supernovae 65 ULIRGs 65 distant quasars 65 gravitational waves 65 redshift 65 supernovas 65 Kuiper belt 65 Milky Way Galaxy 65 planets 64 solar nebula 64 interstellar clouds 64 Milky Way 64 galaxy formation 64 KBOs 64 stellar nurseries 64 exoplanets 64 millisecond pulsars 64 Type Ia supernova 64 X ray Observatory 64 gamma ray bursts 64 interstellar medium 64 galactic disk 64 pulsar 64 X ray telescopes 63 nuclei 63 X ray binary 63 protoplanetary disks 63 Hubble observations 63 blazars 63 solar corona 63 red supergiants 63 protostars 63 Gravitational waves 63 WASP #b 63 gravitational lensing 63 gravitationally bound 63 supermassive 63 magnetars 63 nebula 62 galaxy 62 distant galaxy 62 supernova remnant 62 atoms 62 extrasolar planets 62 moonlets 62 quark gluon plasma 62 redshifts 62 gravitational interactions 62 antimatter particles 62 terrestrial planets 62 novae 62 Milky Way halo 62 spacetime 62 accreting 62 distant supernovae 62 Andromeda galaxy 62 type Ia supernovae 62 colliding galaxies 62 astronomers 62 X ray wavelengths 62 comet nucleus 62 hot Jupiters 61 red supergiant 61 supermassive stars 61 gamma ray burst 61 gravitationally 61 accretion disks 61 Neutron stars 61 Eta Carinae 61 X ray emitting 61 magnetic fields 61 Earth magnetosphere 61 starburst galaxy 61 Bullet Cluster 61 infall 61 gravitational radiation 61 cosmic microwave background 61 SN #A 61 Saturn rings 61 atomic nuclei 61 Coma Cluster 61 RS Ophiuchi 61 protoplanets 61 Orion Nebula 61 filamentary structure 61 Type 1a supernovae 61 comets 61 galaxies collide 60 Virgo Cluster 60 neutrino 60 ejecta 60 planetary nebula 60 circumstellar 60 super Earths 60 neutralinos 60 HD#b 60 gaseous planet 60 faint galaxies 60 WIMPs 60 Hanny Voorwerp 60 brown dwarf 60 XMM Newton 60 sunlike stars 60 Andromeda Galaxy 60 HM Cancri 60 gravitational 60 nebulae 60 active galactic nucleus 60 icy moons 60 circumstellar disk 60 gravitational microlensing 60 NASA Chandra 60 baryons 60 magnetic reconnection 60 blue supergiant 60 millisecond pulsar 60 galaxy NGC 60 observable universe 60 proto galaxies 60 GRB #B 60 gravitational lenses 60 planets orbits 60 Earthlike planets 59 exoplanet 59 extragalactic 59 AB Aurigae 59 sodium atoms 59 lensing galaxy 59 interstellar cloud 59 Arches Cluster 59 constellation Cassiopeia 59 Type Ia supernovas 59 planet HD #b 59 planets orbiting distant 59 hydrogen atoms 59 gamma rays 59 Cepheids 59 blazar 59 nebular 59 Wolf Rayet stars 59 magnetosphere 59 gravitational attraction 59 Hot Jupiters 59 GRB # 59 metallicity 59 fainter objects 59 transiting planets 59 chondrules 59 Saturn magnetosphere 59 cosmic phenomena 59 supernova 59 type Ia supernova 59 extrasolar 59 interstellar dust 59 neutrinos 59 Virgo cluster 59 galaxy M# [002] 59 HD #b [002] 59 Fomalhaut b 59 vortices 59 Red Rectangle 59 circumstellar disks 59 X ray observatories 59 protoplanet 59 SMBH 59 Carina Nebula 58 subatomic particles 58 Crab Nebula 58 Beta Pictoris b 58 comet 58 GeV 58 interacting galaxies 58 supersymmetric particles 58 gravitational lens 58 Omega Centauri 58 Antennae Galaxies 58 Cosmologists 58 gaseous planets 58 distant quasar 58 SN #gy 58 galactic mergers 58 giant elliptical galaxies 58 positrons 58 astrophysical objects 58 particles WIMPs 58 luminosities 58 general relativity 58 solitons 58 Oort cloud 58 moonlet 58 galactic bulge 58 radial velocity 58 axion 58 star Gliese 58 nucleosynthesis 58 GJ#b 58 astrophysical 58 spiral galaxy 58 planets orbiting 58 foreground galaxy 58 microquasar 58 Kuiper belt objects 58 Bose Einstein condensate 58 intrinsic brightness 58 planets orbiting stars 58 galactic cosmic rays 58 ionized gas 58 Enceladus 58 filaments 58 collisional 58 astrophysicists 58 ionized hydrogen 58 microlensing events 58 spectra 58 proplyds 58 baryonic 57 TrES 4 57 SMBHs 57 trans Neptunian objects 57 photons 57 impactors 57 reionization 57 optical telescopes 57 Oort Cloud 57 Henize #-# 57 rubidium atoms 57 planet orbits 57 Bok globules 57 magnetospheric 57 SN #E 57 Gamma ray bursts 57 Wolf Rayet star 57 gamma ray emission 57 atomic particles 57 cosmic microwave radiation 57 Astronomers 57 helium atoms 57 Alfven waves 57 BP Psc 57 X ray pulses 57 cosmological distances 57 planets moons 57 dynamical 57 X ray binaries 57 superfluid 57 relativistic particles 57 magnetic monopoles 57 CMEs 57 Higgs particle 57 baryon 57 asteroids 57 TNOs 57 galactic cores 57 planet orbiting 57 planemos 57 exoplanets orbiting 57 cosmologists 57 Kuiper Belt objects 57 dense clumps 57 Bose Einstein condensates 57 Trifid Nebula 57 planetary embryos 57 RS Oph 57 Fornax cluster 57 cosmic rays 56 Kuiper Belt 56 masers 56 galactic halo 56 gravitational wave 56 nucleons 56 infrared wavelengths 56 extrasolar planetary systems 56 faraway galaxies 56 Spitzer Space Telescope 56 spectroscopic 56 elongated orbits 56 Supernovae 56 antiprotons 56 relativistic jets 56 Astrophysicists 56 constellation Virgo 56 galaxy M# [001] 56 neutrons 56 WMAP 56 astronomical objects 56 ESA XMM Newton 56 gamma ray flares 56 supergiant star 56 extrasolar planet 56 rotating neutron stars 56 XTE J# 56 constellation Ursa Major 56 weak gravitational lensing 56 moons orbiting 56 filamentary 56 CMB photons 56 lunar crust 56 afterglows 56 extrasolar planets orbiting 56 habitable planets 56 substorm 56 heliosphere 56 Magnetars 56 moon Mimas 56 distant galaxy clusters 56 Magellanic Clouds 56 GJ #b [001] 56 high redshift galaxies 56 Seyfert galaxies 56 maser emission 56 nucleobases 56 electron neutrinos 56 Active Galactic Nuclei 56 muons 56 CoRoT 7b 56 Lyman alpha 56 particles 56 antiparticle 56 eclipsing binary 56 carbonate minerals 56 Higgs bosons 56 hypervelocity stars 56 galactic collisions 56 gravitational interaction 56 microlensing 56 HII regions 56 W boson 56 phonons 55 submillimeter galaxies 55 CMB radiation 55 fermions 55 sunlike star 55 Mpc 55 atomic nucleus 55 excitons 55 supergiant stars 55 organic molecules 55 Beta Pictoris 55 electrons 55 cosmic ray particles 55 Gal Yam 55 RXTE 55 planet magnetosphere 55 SDSS II 55 dwarf spheroidal galaxies 55 occultations 55 exoplanetary 55 CoRoT #b 55 permanently shadowed craters 55 tidal tails 55 NGC# 55 carbonaceous chondrites 55 celestial object 55 SN #C 55 GQ Lupi 55 Cat Paw Nebula 55 Small Magellanic Cloud 55 nucleon 55 Kuiper Belt Objects 55 Trojan asteroids 55 Fermi telescope 55 cometary material 55 phyllosilicates 55 luminosity 55 redshifted 55 X ray observatory 55 hydrogen nuclei 55 Hawking radiation 55 P/# A2 55 blue straggler 55 exo planets 55 Alfvén waves 55 axions 55 substorms 55 proto cluster 55 Kepler #b 55 Type Ia 55 Galilean moons 55 spherically symmetric 55 PSR J# 55 GALEX 55 coronal mass ejections 55 AU Mic 55 elliptical galaxy NGC 55 cosmological parameters 55 Large Magellanic Cloud 54 astrophysical phenomena 54 Cancri e 54 Supernova #A 54 diffraction pattern 54 non baryonic 54 exciton 54 Crab Pulsar 54 giant elliptical galaxy 54 jovian 54 antiparticles 54 sterile neutrino 54 transiting planet 54 dynamical evolution 54 spectroscopic observations 54 polar vortex 54 galaxy NGC# 54 barred spiral galaxy 54 chemical abundances 54 stellar occultations 54 GJ #b [002] 54 photosphere 54 corona 54 NASA Wilkinson Microwave 54 TrES 54 asteroids orbiting 54 Cosmic Microwave Background 54 spiral galaxy NGC 54 infalling 54 Saturn moons 54 weakly interacting 54 WM Keck Observatory 54 interstellar dust clouds 54 habitable zones 54 intracluster 54 optical wavelengths 54 Keck Interferometer 54 Epsilon Eridani 54 SN#A 54 branes 54 silicate dust 54 constellation Hercules 54 high temperature superconductivity 54 brightest supernova 54 exoplanet orbiting 54 magma ocean 54 quantum gravity 54 relativistic proton dark 54 baryonic matter 54 superdense 54 visible wavelengths 54 constellation Centaurus 54 Mimas 54 G#.# +#.# 54 NASA Cassini spacecraft 54 interferometry 54 gravitons 54 muon 54 submillimeter wavelengths 54 planetesimal 54 torus 54 auroras 54 globular star 54 subatomic 54 Epsilon Aurigae 54 mantle plumes 54 J# +# [002] 54 energetic electrons 54 Einstein theory 54 spherules 54 aerosol particles 54 Geminga 54 emission nebula 54 icy comets 54 polaritons 54 Kuiper Belt object 53 spectroscopic measurements 53 spiral nebulae 53 gravity warps 53 protoplanetary 53 V# Mon 53 interstellar dust grains 53 Coma cluster 53 meteoroids 53 galaxy redshift 53 exosolar planets 53 planets circling 53 star Beta Pictoris 53 nanobubbles 53 antimatter 53 RRATs 53 gamma ray observatory 53 Corot 9b 53 Type 1a supernova 53 chromosphere 53 Upsilon Andromedae 53 cluster NGC 53 heavily cratered 53 XMM Newton observations 53 Kazantzidis 53 optical microscopy 53 HAT P 53 distant supernovas 53 constellation Carina 53 Pulsars 53 Galilean satellites 53 cosmic ray 53 Lagoon Nebula 53 Globular clusters 53 fermion 53 Astrophysical Journal 53 Cepheid variables 53 quarks 53 particle acceleration 53 Rydberg atoms 53 planet Uranus 53 planets comets 53 moons 53 celestial bodies 53 B mesons 53 Venusian atmosphere 53 moon Ganymede 53 planet WASP #b 53 Sagittarius B2 53 Galaxies 53 Cygnus X 53 numerical simulations 53 GRB 53 Supermassive black 53 celestial objects 53 particle detectors 53 Gravitational lensing 53 gamma ray 53 planetoid 53 optical spectra 53 PSR J# +# 53 gamma ray emitting 53 solar flares 53 DEEP2 53 stony meteorites 53 polarimetry 53 ultracold atoms 53 auroral 53 ringed planet 53 Galaxy Evolution 53 Saturnian moon 53 infrared telescopes 53 Pluto Charon 53 Bose Einstein condensation 53 supernovae explosions 53 Anisotropy Probe 53 Astrophysical 53 Solar System 53 Jupiter magnetosphere 53 Stephan Quintet 53 sized planets orbiting 53 silicon monoxide 52 Comet Holmes 52 kaons 52 ultraviolet wavelengths 52 Adam Riess 52 RHIC 52 XMM Newton satellite 52 antihydrogen 52 galactic nuclei 52 electron 52 gravitational tides 52 CAIs 52 Evolution Explorer 52 LHC experiments 52 magnetotail 52 Perseus Cluster 52 Gamma rays 52 proto planetary disk 52 Microlensing 52 wavefunction 52 transiting exoplanets 52 cosmological theories 52 orbits 52 Veil Nebula 52 nanocrystals 52 shorter wavelengths 52 Orion nebula 52 ultraluminous galaxy 52 HUDF 52 proton 52 VLTI 52 RHESSI 52 noctilucent clouds 52 quasiparticles 52 GRB# 52 submillimeter 52 Corot 7b 52 protons 52 singularities 52 silicates 52 Triangulum 52 Wolszczan 52 eccentric orbits 52 Jupiter moon Io 52 CoRoT satellite 52 Astrophysical Journal Letters 52 X ray afterglow 52 WMAP satellite 52 COROT 52 quasicrystal 52 Saturn moon Enceladus 52 lightwaves 52 OGLE TR #b 52 Dwarf galaxies 52 Cosmic Microwave Background CMB 52 sterile neutrinos 52 comet orbit 52 spherical halo 52 gravitational tug 52 wavelengths 52 spatially resolved 52 sun corona 52 proton proton collisions 52 VB #b 52 cometary dust 52 excitations 52 BECs 52 coronal loops 52 colliders 52 supercontinent 52 Quaoar 52 spheroidal 52 muon neutrino 52 helium nuclei 52 anisotropy 52 cosmic magnifying glass 52 brightnesses 52 z = 52 WHIM 52 inhomogeneous 52 reflection nebula 52 electron orbits 52 eclipsing binaries 52 asteroidal 52 oppositely directed 52 antineutrinos 52 olivine 52 RX J# 52 gravitational tugs 52 neutrino mass 52 bosonic 52 Astrophysics Cambridge Mass. 52 relativistic protons 52 geoneutrinos 52 spinning neutron 52 runaway thermonuclear 52 orbits Saturn 52 Rosette Nebula 52 SUSY 52 retrograde orbit 52 Sunyaev effect 52 aurorae 52 laser pulses 52 hadrons 52 planetary nebulas 52 Helix Nebula 52 Cancri 52 Einstein relativity theory 51 gravitational pulls 51 ESO PR 51 Keck telescope 51 cosmic 51 comets asteroids 51 Tarantula Nebula 51 VY Canis Majoris 51 Rydberg atom 51 moon Io 51 electrons orbiting 51 infrared radiation 51 planetary orbits 51 emits X rays 51 superclusters 51 magnetic flux 51 Betelgeuse 51 planet Gliese #c 51 electron spins 51 meteorites 51 spicules 51 antiquarks 51 Toutatis 51 Earths 51 millimeter wavelengths 51 superfluidity 51 quantum particle 51 solar neutrinos 51 antihydrogen atoms 51 molecules 51 boson 51 Vikhlinin 51 Bose Einstein Condensate 51 basaltic rocks 51 NEAs 51 Bug Nebula 51 electron density 51 Super Earths 51 #gy 51 superstrings 51 particle colliders 51 ray Space Telescope 51 hypernova 51 Wilkinson Microwave Anisotropy Probe 51 rotational axis 51 galactic 51 Triangulum Galaxy 51 lithium atoms 51 moon Enceladus 51 pions 51 elliptical orbits 51 Maxwell equations 51 z ~ 51 galactic magnetic 51 ultracold 51 Anisotropy Probe WMAP 51 mesons 51 permanently shadowed 51 velocity dispersion 51 Herschel telescope 51 Planck 51 tau neutrinos 51 quantum mechanically 51 retrograde orbits 51 gamma ray telescopes 51 neutralino 51 positronium atoms 51 evanescent waves 51 inner moons 51 inner asteroid belt 51 proto planetary disks 51 superfluids 51 soliton 51 Doradus 51 star Fomalhaut 51 tiniest particles 51 Jupiter Saturn Uranus 51 ion collisions 51 Zeta Ophiuchi 51 Cosmic rays 51 HL Tau 51 Alex Filippenko 51 ULP cepheids 51 planets orbiting sun 51 transiting exoplanet 51 Area Telescope LAT 51 volcanic magma 51 hydrated minerals 51 tidally 51 supercontinents 51 cometary 51 hematite mineral 51 Gaensler 51 Extrasolar planets 51 exo planet 51 bosons 51 Gliese #g 51 quantum mechanical 51 MG J# +# 51 Wolfgang Brandner 51 radial velocity method 51 superluminal 51 antiferromagnets 51 matter antimatter asymmetry 51 ESO VLT 51 cosmic cannibal 51 cosmological 51 Harvard Smithsonian 51 surface plasmons 51 exosphere 51 X ray spectra 51 comet McNaught 51 filamentary structures 51 nanomagnets 51 asteroid belt 51 ESA Integral 51 deuterium atoms 51 volcanic plumes 51 binary quasar 51 BLG #Lb 51 photons particles 50 molten magma 50 Haumea 50 orbiting planets 50 Iapetus 50 neutrino particles 50 gamma rays emitted 50 Saturnian moons 50 proton antiproton collisions 50 particle beams 50 CoRoT 9b 50 colloidal crystals 50 Martian meteorites 50 geomagnetic storms 50 chondrites 50 spherical particles 50 spectroscopically 50 interferometers 50 TGFs 50 outer planets 50 detect gravitational waves 50 mesosphere 50 Eagle Nebula 50 infrared spectra 50 Helix nebula 50 gravitationally lensed 50 photon 50 SNe 50 constellation Cetus 50 asteroid 50 meteor impacts 50 Extraterrestrial Physics 50 electron pairs 50 inhomogeneities 50 superconductivity 50 calderas 50 coronagraph 50 asteroids comets 50 energetic gamma rays 50 spinning neutron stars 50 spacecraft flyby 50 Sedna 50 gravitational pull 50 constellation Sagittarius 50 dipole moment 50 missing baryons 50 exoplanetary systems 50 high temperature superconductors 50 lunar craters 50 gamma ray bursts GRBs 50 YORP effect 50 protoplanetary discs 50 submillimetre 50 suns 50 post perovskite 50 neighboring Andromeda galaxy 50 neutral mass spectrometer 50 constellation Taurus 50 cesium atoms 50 deep convective clouds 50 Astrophysics 50 airbursts 50 interstellar space 50 moon Mab 50 electron positron 50 Einstein equations 50 Gliese #e 50 electron volts 50 Richard Mushotzky 50 supergiants 50 ESO telescope 50 Orion constellation 50 Jovian moons 50 SEGUE 50 supersymmetric 50 emit X rays 50 supernova SN 50 Tycho supernova remnant 50 hypervelocity star 50 optical interferometry 50 Io Europa 50 Martian craters 50 starquakes 50 chlorophyll molecules 50 OGLE 50 Mandushev 50 cosmic particles 50 supersymmetry 50 laser pulse 50 HD# [002] 50 constellation Eridanus 50 attosecond 50 stellar seismology 50 binary asteroids 50 proton antiproton 50 nucleation 50 Kuiper belt object 50 Komossa 50 photon energies 50 photons emitted 50 Optical Gravitational Lensing Experiment 50 terahertz radiation 50 smallest exoplanet 50 potassium atoms 50 Voorwerp 50 fading afterglow 50 KH #D 50 particle astrophysics 50 angular momentum 50 Sagittarius dwarf galaxy 50 HIRES spectrometer 50 muon neutrinos 50 star Proxima Centauri 50 Io volcanoes 50 ROSAT 50 Doppler shifts 50 spectral fingerprints 50 strange quark 50 Chi Cygni 50 undiscovered particle 50 inhabitable planets 50 velocities 50 coronal mass ejection 50 glows brightly 50 quasicrystals 50 particle 50 dense neutron stars 50 Comet 9P/Tempel 1 49 comet dust 49 radial velocity technique 49 Mushotzky 49 quantum mechanics 49 habitable worlds 49 particle collisions 49 Elliptical galaxies 49 faintest galaxies 49 VISTA telescope 49 Filippenko 49 J#.# [001] 49 SN #D 49 Saturn outermost 49 baryon acoustic oscillations 49 Gondolo 49 planetoids 49 cosmological constant 49 Saturn aurora 49 dust enshrouded 49 outermost planets 49 gaseous envelope 49 cosmic strings 49 Hubble Constant 49 gravitational perturbations 49 proton collisions 49 Planck satellite 49 Planetary nebulae 49 CoRoT 49 cosmological models 49 Dumbbell Nebula 49 electroweak 49 VIRTIS 49 abundances 49 electron neutrino 49 diffuse aurora 49 subatomic particle 49 comets orbiting 49 interstellar dust particles 49 Quadrantids 49 circular orbits 49 moon Charon 49 Earthlike planet 49 spatial dimensions 49 primitive meteorites 49 sparticles 49 Scheila 49 meteorite fragments 49 VHE gamma rays 49 unaided eye 49 SNR #-#.# 49 dynamical processes 49 electron beams 49 earthshine 49 protoplanetary disc 49 Submillimeter Array 49 spectroscopy 49 quanta 49 Explorer WISE 49 Saturn auroras 49 meteorite impacts 49 infalling gas 49 PSR B# +# 49 Gliese #d 49 DZero